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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Name the Following Radicals : So42 - Chemistry

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प्रश्न

Name the following radicals :

SO42

एका वाक्यात उत्तर

उत्तर

SO42- = Sulphate

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पाठ 4: Atoms, Molecules and Radicals - Exercise

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सेलिना Concise Chemistry [English] Class 7 ICSE
पाठ 4 Atoms, Molecules and Radicals
Exercise | Q 5.1

संबंधित प्रश्‍न

Write the names of `"CuCo"_3` compounds :


Write the names of `"NH"_4"OH"` compounds :


A liquid compound X of molecular mass 18 u can be obtained from a number of natural sources. All the animals and plants need liquid X for their survival. When an electric current is passed through 200 grams of pure liquid X under suitable conditions, then 178 grams of gas Y and 22 grams of gas Z are produced. Gas Y is produced at the positive electrode whereas gas Z is obtained at the negative electrode. Moreover, gas Y supports combustion whereas gas Z burns itself causing explosions.

  1. Name (i) liquid X (ii) gas Y, and (iii) gas Z.
  2. What is the ratio of the mass of element Z to the mass of element Y in the liquid X ?
  3. Which law of chemical combination is illustrated by this example ?
  4. Name two sources of liquid X.
  5. State an important use of Y in our life.

The valencies (or charges) of some of the ions are given below :

Ion            Valency        Ion                Valency                        (Charge)                             (Charge)

Sodium ion       1+      Nitrate ion            1–  
Copper ion       2+       Sulphide ion         2–

Using this information, write down the formulae of :

  1. Sodium sulphide
  2. Copper nitrate

A particle P has 18 electrons, 20 neutrons and 19 protons. This particle must be :


Write symbols of the following elements and the radicals obtained from them and indicate the charge on the radicals.

Mercury, potassium, nitrogen, copper, sulphur, carbon, chlorine, oxygen


What do you understand by the following terms?

Acid radical 


Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compound.

Chromium sulphate


Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compound.

Sodium zincate


State if the following element or radical is divalent?

Nickel


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